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Lube Notes 7 - Dual Bypass Oil Filter Installation
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The Winter 2009 issue of maxxTORQUE featured The LMM Duramax and Bypass Filtration Systems article on bypass filtration design and benefits. In that article, the design options of a dual remote bypass system or a single bypass system were discussed as well as the filtration capabilities of both systems (see Diagrams A & B, page 13). The article included a detailed discussion of the ramifications of the new Duramax engine design for pollution control and how this design creates higher levels of soot; it culminated with my recommendation to install bypass filtration on the LMM Duramax engine as a necessary addition and suggested that not only the LMM but all diesel engines stand to benefit from bypass filtration. A review of that article, prior to reading this article, will provide excellent background information for this installation article.

In summary, oil bypass filtration

• Dramatically extends drain intervals;
• Improves oil cooling;
• Increases filtration capacity and life;
• Increases fluid system capacity;
• Efficiently removes small particles and soot;
• Significantly extends engine life;
• Allows equipment to run constantly on clean oil;
• Increases engine efficiency; and,
• Removes particles less than one micron in size.

Jon Moore of Boca Raton, Florida recently purchased a new Chevy Silverado pickup fully equipped with the Duramax and Allison for towing a fifth wheel trailer. Jon, a retired engineer from Pratt & Whitney Corporation and a longtime certified aircraft mechanic and pilot, read the Bypass article in maxxTORQUE, called me and purchased the Amsoil Dual Remote Bypass System. This article explains the installation procedure and provides some comments on the system components, ease of installation and system quality.

The Amsoil Bypass System comes as a complete kit for both the GM Duramax and the 6.5 Turbo Diesels. The Duramax kit that Jon needed is part number BMK-27. The BMK-27 is a dual remote oil bypass system that places the full flow filter and the bypass filter side by side on a manifold located remotely from the OEM filter location. Figure One, shows the components provided in the BMK-27 plus a custom made bracket that facilitates ease of installation. The original bracket for mounting the manifold, included in the BMK-27 kit, is simply not long enough to clear the stabilizer bar on the inside of the frame rail under the truck, so a custom made bracket was designed to allow clearance. As you can see from the photo, the materials are very high quality, bordering on overkill for this low pressure lube oil system.

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Jon’s comments at the start summed things up:

I have been working on automobiles, airplanes, and various other vehicles/machinery for 45 years. I was very impressed with the design and quality of the components and hardware in the Remote Filter Kit. Over the years, I have dealt with a lot of retrofit kits, parts, etc., including aircraft hardware, that were inferior in design and quality to this kit. In addition, I found the instructions provided with the kit to be very clear and comprehensive: very user-friendly and easy to follow. In my judgment, anyone with a moderate mechanical ability could easily install this kit, including the assembly of the hoses.

As Jon said, the instructions come in the kit and, if you follow them, you will end up with a good installation. The following installation overview is not intended to replace those instructions but to give you an idea of what is involved.